Which type of signage relates to specific offers and may be found in windows?

Promotional signage is specifically designed to highlight special offers, discounts, or limited-time promotions and is often placed in windows to attract the attention of passersby. This type of signage is effective in driving customer traffic into the store by communicating enticing deals that may encourage impulse purchases. It serves a critical role in marketing strategy and sales promotions by making consumers aware of current offers and creating a sense of urgency to buy.

Department signage is generally used to indicate different sections within a store, guiding customers to various product categories rather than emphasizing specific promotions. Digital signage can be dynamic and often includes advertisements or information, but it's not exclusively dedicated to specific promotional offers. POS (Point of Sale) signage typically refers to displays located at the checkout area that may remind customers of add-on items or reinforce brand messaging, but it does not primarily focus on window displays or ongoing offers.

Thus, the identification of promotional signage as related to specific offers makes it the correct choice in this scenario.